Illinois State University, ILP and Physics, Normal, IL 61790-4560
The use of potentials with negative imaginary part has been used widely in atomic and molecular physics to increase the interaction time that can be studied via space-time resolved numerical grid methods. The unwanted portion of the quantum mechanical wavefunction that would normally reflect at the boundary and interfere with the dynamics can be absorbed by the use of these potentials. However, this commonly used technique cannot be applied to multi-particle wavefunctions. We propose a new scheme where we artificially increase the mass of the particles close to the boundaries. In this way the particles can be decelerated to rest and therefore kept from reentering the interaction region.
This work has been supported by the NSF.
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